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Two poles of height a and b stand at the...

Two poles of height a and b stand at the centers of two circular plots which touch each other externally at a point and the two poles subtend angles of 30° and 60° respectively at this point, then distance between the centers of these plots is

A

`a+b`

B

`((3a+b))/(sqrt3)`

C

`((a+3b))/(sqrt3)`

D

`asqrt3+b`

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The correct Answer is:
B
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